Sobhuza's mother Somnjalose was the younger sister and inhlanti co-wife to her elder sister Lojiba Simelane, Ndvungunye's senior wife. Lojiba had no male children herself. Sobhuza, as son of her sister co-wife, was considered Lojiba's classificatory son under Ngwane royal kinship and succession principles. While Sobhuza thus became Ndvungunye's heir and successor, Lojiba rather than Somnjalose became Indlovukati or Queen Mother upon his accession.
Kingship
The reign of Sobhuza I marked a crucial phase in the history of Eswatini. As Sobhuza began his reign, KaNgwane was a realm centered in territory along the Pongola River to the south of modern Swaziland, whose northern reaches encompassed today's southern Swaziland. KaNgwane was ruled by kings of the Dlamini clan, who had earlier ruled an area in and around the Lubombo Mountains to the east. It was only under Sobhuza's grandfather, Ngwane III, ca. 1750, that the Dlamini kings conquered and established the country Sobhuza inherited, incorporating more than a dozen smaller chiefdoms led by chiefs from other clans. Early in Sobhuza's reign, the Ngwane kingdom faced strong risks of conquest by the more powerful Ndwandwe and Zulu kingdoms to the south in the 1810s and 1820s. Sobhuza moved the main royal center northward into what is now Zombodze central Eswatini, with many of his followers relocating as well. The former royal centers in Shiselweni became southern outposts. After moving the center of Dlamini royal power to the north, Sobhuza led the conquest of many local chiefdoms. KaNgwane became a kingdom comparable in scope and power to those of the Zulu, the Maroti kingdom, or the Pedi. Sobhuza I notably married inkhosikati Tsandzile Ndwandwe the daughter of Zwide Ndwandwe the leader of the powerful Ndwandwe clan south of the Pongola River. The Swazi clans under the leadership of Sobhuza I were constantly in conflict with the Ndwandwe’s. As a result, Sobhuza made an offer to marry one of the daughters of Zwide and establish peace with his neighbours. Sobhuza I had in total three wives, the first of whom, Tsandzile, bore him Mswati II and Mzamose Dlamini. Mswati would eventually succeed him as king.
Later life
Sobhuza died in 1836 and is buried at the royal burial site at Mbilaneni. Sobhuza left his son Mswati II a country claimed to be reaching modern day Barberton in the north, Carolina in the west, Pongola River in the south and Lubombo Mountains in the east, which is larger than present day Eswatini. The clans that were conquered before and during Sobhuza's tenure are referred to as Emakhandzambili.
